Because Nitrogen is required to biosynthesize basic building blocks of plants, animals and other life forms.
Phenolphthalein turn pink in basic solutions.it turn colourless in acid solution.
Hence options(1)is correct
The pH is the measure of hydrogen ion concentration in a solution. The hydrogen ion concentration at pH 1.25 is .
<h3>How to calculate hydrogen concentration?</h3>
The pH is the negative logarithmic value of the hydrogen ion concentration in the sample.
The pH can be expressed as:
The hydrogen ion concentration can be given as:
The given pH is 1.25 The hydrogen ion concentration is given as:
The hydrogen ion concentration in the solution is .
Learn more about pH, here:
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Answer:
Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground.
K2so4
the oxidation number of sulphur
2[1]+s+4[-2]=0
2+s-8=0
s=-6